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An interesting redesign How are you planning to seal the brass plug that allows access to the valves?
Roger--When I design something, I use the absolute best idea I have ever had, giving consideration to shape, function, and machinability. As soon as I begin making the part, or sometimes after making it, I see ways that it could have been improved. It would be wonderful if I had these new ideas in the first place, but the world doesn't work that way.